Here is the 1st trailer to Equestria Civil War.
(We see Nighlock walking up to Twilight after exiting one of his portals)
Twilight Sparkle:(turns to look at him)
Nighlock: Could I talk to you?
Twilight Sparkle: What is it, Anthony?
Nighlock: I know you don't agree with the new law. I don't either.
(We see an explosion destroy part of Ponyville's Town Hall)
Twilight Sparkle: And now there's nothing we can do about it.
Nighlock: We can fight it.
(Captain America: Civil War - Trailer 1 Music plays as we see Applejack fighting her way through some Royal Guards alongside Bucky and then jump out a window)
(We see a helicopter flying over and ocean to a nearby prison to Canterlot)
Princess Celestia: Princess, while a great many people and ponies see you as fair and just, there are some who would prefer the word lenient.(shows Twilight and the Mane 6 the Reformed Villains Accords) You've helped and stopped people and ponies with unlimited power and no supervision. That's something Equestria can no longer tolerate.
(Twilight looks upset about this)